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Finding the Fourth Proportional to 717,963.57, 990,774.81 and 395,665.38

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Solution

The fourth proportional to 717,963.57, 990,774.81 and 395,665.38 is: 546,010.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,963.57 : 990,774.81 = 395,665.38 : x
  2. Step 2: Convert to fraction form
    717,963.57/990,774.81 = 395,665.38/x
  3. Step 3: Cross multiply
    717,963.57x = 990,774.81 × 395,665.38
  4. Step 4: Simplify right side
    717,963.57x = 392,015,291,693.08
  5. Step 5: Solve for x
    x = 392,015,291,693.08/717,963.57
  6. Step 6: Final answer
    x = 546,010.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.